Strickling machine



Dec. 5, 1950 v o. G. J. MEUNIER 2,532,634

STRICKLING MACHINE Filed June so, 1947 v 2 Sheets-Sheet 1 Dec. 5, 1950o. G. J. MEUNIER 2,532,634

STRICKLING MACHINE Filed June 30, 1947 2 Sheets-Sheet 2 i 17 IX: IIHI 2223 22 5 .JIIVIIZ 5 INVENTO R: Oclofl,6bisl0in Jqszpb bcrp e w AT E'MPatented Dec. 5, 1959 UNITED STATES GFFICE STRIGKLING MACHINE OdonGhislain Joseph Meunier, Fayt-lez-Manage, Belgium Section 1, Public Law690, August 8, 1946 Patent expires December 14, 1962 I 1 Claim.

My invention relates to a strickling machine that, while allowing ahighly accurate strickling, reduces considerably the duration of saidoperation. 1

The casting with a gig is applicable to parts of revolution of asufiiciently large size such as wheels, flywheels, bells and the like bymeans of a gig or strickle with a well-defined outline, that is causedto rotateinside the sand round the axis of revolution of the part to becast.

Generally speaking the strickling is performed by hand, by means of moreor less primitive instruments, directly on the ground or the foundry inthe casting hall or else in a casting box.

Bells are preferably cast inside a pit on a v masonry foundation servingas a core and allowing ramming the thickness piece that is cast with ahand gig and the like primitive tools.

Consequently, the stlilckl'ing up to this day is a delicate operationthat requires a comparatively long time and also skilled workmanship,without providing however a high accuracy, the tools available beingonly primitive instruments that do not allow any accurate work, andrequiring considerable complications in the case of eccentric stricklingfor instance.

My invention has for its object to remove these various drawbacks andconsists chiefly in that a mechanical control gives the tool carryingspindle and socket a continuous rotary movement around a vertical axisso that it is brought gradually and automatically to the desired heightwhile it is also displaced as desired in a horizontal plane with a viewto eccentric strickling, means being provided to this purpose first forensuring a con- 1 tfnuous rotary movement for said spindle, then forensuring the vertical displacements of the latter and lastly forbringing the strick-ling tools eccentrically into their first operativeposition.

The vertical displacements of the spindle are produced through theassociation of two gears one of which is automatic and provides forrapid operation through a displacement of the whole driving mechanismwith its carrier through a power control while the other provides adiiierential progression for the accuracy adjustment through a slidingof a member including bearings for the axis of the tool spindle and iscontrolled by hand.

In accompanying drawings is illustrated by way of example a form ofexecution of my invention. In said drawings:

Fig. 1 is an elevational view of a strickling machine according to theinvention.

Fig. 2 is a cross-section through line II of Fig. 1.

Fig. 3 is a plan view of the strickling machine.

Fig. 4 is a cross section through line IIII of Fig. 1.

In the form of execution illustrated in the drawings, the stricklingmachine includes a frame comprising a stand 1 with four arms, carryingan upright 2.

A slideway carrier 3 is freely and rotatably mounted on the upright 2and its rotation is made easier through the interposition of one or moreball bearings.

The slideway carrier 3 is rigid with a dove-tail shaped slideway andalso with a bearing 5. On said slideway carrier may move vertically acrossbeam t forming a frame and to which is secured a motor atransmitting its rotary movement to a shaft it through the agency of thepinions 88 --8 i t and of a speed reducer 9. The disconnection of theshaft It with reference to the speed reducer Q is ensured through aclutch l l.

The shaft it extends between the clutch II and the remote end of thecross beam 5. It carries slidingly two auxiliary clutch components I2and i2 that are adapted to engage cooperating clutch components rigidwith the correspondin pinions I 3 and it so that the selective slidingof each clutch component 32 or 12 provides for the rotation' in thecorresponding direction of the pinion M in permanent mesh with bothpinions l3 and E3.

The pinion M is mounted on a shaft that has its bearings inside thetransmission box 16 secured to the slideway carrier 3; on the shaft i5is provided a groove allowing the drive through the agency of a key of atoothed wheel ll housed inside the box it.

A gearwheel is rotating around a spindle housed inside the box it isdriven by the toothed wheel ll through the agency of the pinion il Thegearwheel E8 is rigid with a threaded rod l9 that has its bearingsinside the box It on one hand and inside the bearing 5 provided to saidpurpose on the other hand.

The worm is is screwed inside the cross-member 6 whereby, according tothe direction of rotation of the worm i 53, said cross-member 5 is urgedin an upward or downward movement along the slideway carrier in order toprevent the crossrnember ii from rotating with the slideway carrier 3around the upright 2 of the frame, there is provided a catch piece it!pivotally secured to said upright 2 and that may be housed inside one ofthe grooves 25 provided on the upper edge or the slideway carrier.

To the shaft iii rotating freely inside the bearings 22 is secured aworm 23 meshing with a helical gearwheel with a concave system of teeth24 that slides through the agency of a key for instance, along a grooveprovided for this purpose in a tool-carrying shaft 25 whereby said shaft25 may move vertically while remaining in engagement with the wheelprovided with the concave set of teeth 24.

The tool carrying shaft is held in the bearings 25- 26 provided in aslider 27 that may move vertically in a slide-way 28 assuming a dovetail shape and provided on a carriage 29.

The carriage 29 rests on the upper surface of the cross-member 6 throughthe agency of guiding members til-3i so as to be capable of movinglongitudinally with reference to said crossmember under the action of athreaded spindle 32 controlled by a hand-wheel 33 and that has itsbearings 34 inside said cross-member 6.

Inside the slider 27 may rotate a threaded shaft 35 to which is screweda bevel gear-wheel 36 that is held against the cross member 6 so that,at the moment of the operation of a hand wheel 3'! rigid with the bevelgear 38 which is constantly in mesh with the gear wheel 3%, the slidermay move vertically inside the carriage.

To the lower end of the tool carrying shaft 25 is secured the toolcarrying spindle 39 with two flanges inside which are provided openings33 for securing the strickling tool or tools, the strickling boards andthe like.

Through the operation of one of the clutches l2i2 it is possible toraise or to lower the frame cross-member so as to bring progressivelythe tool to the desired level and also to raise it once the stricklng isat end. Preferably and with a view to obtaining a maximum accuracy, thetool will be lowered up to a few millimeters from the desired level andthe final adjustment of the downward movement of the tool will beperformed through the hand-wheel 3?; thus the sl der 27 is urgeddownwards and carries along with it the tool carryin shaft 25.

To make the adjustment easier, the upper part of the tool carrying shaftcarries a scale whereby it is possible while controlling the handwheel3? to follow the downward movement of the tool with a very high accuracywithout requiring measurements that are often intricate and require muchtime.

When it is desired to execute a strickling around vertical axes atvariable distances from the axis of the slideway carrier 3, that is tosay when it is desired to provide for strickling operations that areeccentric with reference to one another, it is suiiicient to shift thecarriage 29 by actuating the handwheel 33 controlling the threadedspindle 32 acting on the radial location of said carriage. In order tomake it easier to measure the shifting to be given to the tool, thecross-member carries a scale in front of which may move a mark rigidwith the carriage; it is thus possible to provide for a direct readingof the eccentricity given to the tool.

It may occur that a certain play arises between the different memberscontrollin the slider and possibly that wear appears between the sliderand its carriage and to this end there is provided a nut 4i screwed overthis threaded shaft and allowing the slider to be held fast at apredetermined operative height, on the carriage 29.

During the strickling operation it is necessary in most cases to definethe location of various other parts of the mould that is to define thefeatures of the part to be strickled; to this pur- 4 pose there issecured to the lower part of the carriage a protractor dial 42subdivided into 360 in front of which may move a hand not illustratedsecured for instance to the spindle 39.

Without any displacement of the strickling machine, being necessary, itis possible to execute several strickling operations; it is sufiicientas a matter of fact to raise the catch 2i! and to rotate thecross-member 6 through the desired angle; the cross-member will be heldin the position given out by the housing of said catch in another groove2| corresponding to the new position selected. In the drawings, thereare provided four different positions at for the crossmember but itshould be understood that this number may vary according to the intendedapplication and size of the strickling machine.

For the erection of the machine, there are provided two water gauges d3,43 in a manner such that the cross-member may always be set in a trulyhorizontal position.

A form of execution of the invention has been thus described andillustrated by way of a mere indication and by no means as a limitationand obviously numerous modifications may be brought to its detailwithout widen-'ng unduly its scope as defined in accompanying claim.

What I claim is:

In a strickling machine, the combination of a vertical independentupright, an undeformable rigid radial member fitted over said uprightadapted to revolve unrestrictedly around same provided with alongitudinal slideway, a strickling tool holding means including avertical spindle portion, a socket rotatably carrying said spindle, acarrier for said socket adapted to slide in the longitudinal slideway ofthe radial member, a motor carried by the radial member near the rotaryaxis thereof, a horizontal shaft carried by the radial member andcontrolled by the motor, a vertical threaded rod rotatably carried bythe tool socket, a gearwheel engaging said threaded rod and heldpermanently at an invariable level with reference to the radial member,hand-operated means controlling the angular setting of said gearwheeland thereby the vertical location of the tool socket with reference tosaid radial member, and control means for adjusting the longitudinalposition of said carrier and consequently of the spindle and wormwheelon the slideway.

ODON GHISLAIN J OSEPE MEUNIER.

REFERENQES CETED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 28,260 Daugherty May 15, 1860248,534 Walker Oct. 18, 1881 287,326 Richards Oct. 23, 1883 559,635Thompson May 5, 1896 573,783 Groves Dec. 22, 1896 646,750 Mill Apr. 3,1900 1,278,407 Werth Sept. 19, 1918 1,299,241 Sears Apr. 1, 19192,238,785 Walton Apr. 15, 1941 FOREIGN PATENTS Number Country Date259,451 Germany May 7, 1913 448,348 Belgium Jan. 1943

